Thanks again for your fast reply. Requested the option in ‘Better Search’ to exclude pages.
If I search for a term that only exists in the database (example Abash) the following result page is generated:
A link to http://new.mainecoon.nl/wordpress/catteries is in the result page.
If you click it, for a fraction of a second the contents of http://new.mainecoon.nl/wordpress/catteries is shown.Then a blank page with an email address from the database is shown in the top left corner.
The same behaviour with the standard search engine from WordPress. If it can be fixed from your end that would be great. If the creator of ‘Better Search’ comes with a possibility to exclude pages, it is also solved.
If you need access or something, let me know.